Rip Curl Men's a2221-MID Detroit Stainless Steel Midnight Black Watch Date function 316L stainless steel case and band: The highest grade of stainless steel for water resistance, strength and non-corrosion in a marine environment. Midnight style with all-black dial, case and band Gravity collection Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving